Pulley.



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. www l C. L. SPEIGHT.

PULLEY.

APPLICATION FILED MAY 7, 1912.

1,1 22,324, A Patented Deo. 29, 1914.

2 SHEETS-SHEET 2.

W] YYVESSES burro sains ,l CHARLES L. srEjIGHT, or cLARioN, IOWA.

PULLEY.

Specification of Letters Patent. Patentd Dec, 29, 1914;,

I Application 'ied May 7, 1912. lSerial No. 695,63);V

To all whom z'tmag/ concern Be it known that I, CHARLES L. Serienr, a citizen of the United States, residing at Clarion, in the county of Wright and State have'invented certain new and use of which the commodate the pulley for shafting or pulley bodies of different diameters and also'increase or decrease the peripheral working surface of the pulley.

In the further disclosure of the invention reference is to be had to the accompanying drawings, constituting a part. of this specification, in which similar characters of reference denote corresponding parts in all the views, and in which: j

Figure 1 is a perspective `View of my device, showing the same used in connection 'with a pulley body. Fig. 2 isa vertical sectional'view, showing the device secured directly to shafting. Fig. 3 is a fragmentary sectional view taken on the line 3-3 of Fig. 1. Fig. 4 is a perspective view of one of the supporting members. Fig. 5 is a perspective view of one form of adjusting member used in connection with my device'. Fig. 6 is a perspective view of another form of adjusting member, and Fig. 7 is a vertical sectional View of a modifiedform of my device.

Referring more particularly to the views I employ a plurality of connectible sections 10, 11, embodying semicircular hub members 12, 13 and semicircular rim members 14, 15, supported on the hub members 12, 13 by supporting members 16, 17 respectively. The ends 18, 19 of the respective hub members 12, 13 are bent outwardly in parallel relation, the ends 20, `21 of the respective rim members 14, 15 being bent inwardly with the outer faces of the ends 20, 21 abutting against and suitably secured to the outer faces of the ends 1S, 19 of the hub members 12, 13. Adjusting members 22, 23, shown in Figs. 5 and 6 respectively, are provided for securing the sections 10, 11 and for relatively adjusting the same, The member 22 consists substantially of a, squared'ihead 24 having threaded Shanks 25 extended from both ends thereof, one of the shanks having right hand threads and the other left hand threads. rIhe member is mounted lto have threaded connection with the adjacent ends of the respective sections 10,11, the squared shank being positioned between the sections so that a suitable wrench can be inserted between the ends'of the sectionsto engage the squared head for the purpose of operating the member 22 to relatively adjust the said sections. The adjusting member 23 embodies a squared head 26, a threaded shank 27 extended from one end thereof Vand a`shoulder28 extended from the other end of thehead 26, a circular reduced portion 29 ybeing-formed between the head 26' and shoulder 28 `so. that wheny the adjusting member 23 is employed in connection with the sections 10, 11 the shank '27 will havejthreaded engagement with an end l of'onesectionwhile the adjacent end of the other section will* be received-on the reduced portion 29,' the squared head 26, being inter'- posed betweenthe adjacent ends of, the sec.-y tions 10, 11, so that a wrench can be conveniently inserted between the adjacent ends t0 engagethe head 26 for the `purpose of7operating the member 234 to relativelyV adjust the sections 10, 11.` y

The series of relatively spaced supporting members 16, '17, are interposed ybetween the hub members 12, 13 and the rim members 14, 15,. respectively, the said supporting members lbeing provided to support the rim mem'- `bers 14, 15 on the respective hub members 12,v

13, and each consisting of a plurality ofangular plates 32, terminating at their ends in ears 33, 34, the ears 33 ofthe plates beingl 15, as mentioned heretofore and also adapted to retain the rim members in equ-idistantly spaced relation to the hub members 12, 13.

Referring to Fig. l it will be seen that when my device is employed in connection with a pulley body 35, the sections 10, 11 j are arranged to encircle the periphery of the pulley body, after which the sections are secured in the desired adjusted position by the use of one ofl the forms of adjusting members disclosed in Figs. 5 and 6, it being readily apparent that by connecting the sections 10, 11 in the manner mentioned heretofore, the peripheral surfaces of the sections can be substantially increased or decreased in proportion to the peripheral surface of the pulley body 35, the inner faces or surfaces of the hub members 12, 13, being in engagement with the peripheral surface of the pulley body 35.

Referring to Fig. 2 it will be seen that my device can also be employed in connection with shafting, the device in this instance being directly mounted on a Ashaft 36, with the inner surfaces or faces of the hub members encircling the peripheral surface of the shaft.

ln Fig. 7 I disclose a modified form of my device and in which I employ a single section 37, instead of a plurality of similar sections 10, 11, disclosed in Figs. 1 and 2, the mentioned single section, however, being similar in construction to the sections 10, 11 and applicable to a pulley body or shafting in a similar manner. The section 37 consists of an inner or hub member 38, an outer or rim member 39 and supporting members l0, similar to the supporting members 16, 17, the said supporting members 40 being provided to support the rim member 39 on the hub member 3S, adjusting members, similar to the members disclosed in Figs. 5 and 6, being preferably employed to adjustably connect the ends of the section 37.

It will, of course, be understood that the coacting pairs of braces or supporting members 16-16, 17--17 or .lO-l0 may be integral with ea-ch other, that is, each pair of braces or supporting members may be in the form of a single il-shaped or U-shaped piece, an obvious modification falling within the spirit of the invention.

From the foregoing description it will be seen that in the two forms of my device I provide a construction whereby the device can be used with a pulley body or directly secured to a shaft and whereby the diameter, and consequently the peripheral working surface of the device, can be conveniently and positively increased or decreased, thus also causing a corresponding increase or decrease in the diameter of the sections or section to enable the device to be mounted on a suitable pulley body or shaft.

Havingthus described the invention what I claim as new, is p 1. An adjustable pulley including a hubmember formed from a flat sheet of metal and a rim-memberalso formed from a fiat sheet of metal and surrounding the hub and arranged concentric thereof, each of the said members having oppositely disposed angular ends providing overlapping members that lie one against the other and terminate with the peripheral faces of the respective members and space the said members, angular supports arranged in pairs between and secured to the said members, bolt members having central heads disposed between the opposite pairs of lapping members providing the ends of the pulley and co-engaging with the said members to retain the same one against the other as well as to move the ends of the pulley toward or away from each other to adjust the pulley and sustain the same at such adjustment.

2. An adjustable pulley including a hubmember and a rim-member, each of said members having oppositely disposed angular ends which overlap and terminate with the peripheral faces of the respective members to space the rim from the hub, supports connecting the rim and hub between the ends thereof, boltsarranged between the adjacent ends of the members, each of said bolts being rotatably connected with the overlapping members providing one of the ends, the said bolts adjustably engaging the opposite overlapping members at the second end, and a head arranged medially of each of the bolts.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES L. SPEIGHT.

Witnesses:

U. B. TRACY, F. W. WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

